| 摘要 |
PROBLEM TO BE SOLVED: To provide an aluminum material for a heat-exchanger which is excellent in hydrophilicity and corrosion-resistance, is excellent in film adherence as well, and of which the press workability is good. SOLUTION: In this aluminum material, on the surface of aluminum or an aluminum alloy, a non-porous film comprising an aluminum oxide having a thickness of 20 to 300 nm, and a porous film comprising an aluminum oxide or an aluminum hydrous oxide having a thickness of 30 to 300 nm are provided in order. Thus, the aluminum material for which 10 to 1,000 mg/m<SP>2</SP>of a silicate is contained in the porous film, and on the surface of which a hydrophilic film coating is formed is obtained. As the hydrophilic film coating, publicly known various kinds of film coating can be utilized. COPYRIGHT: (C)2004,JPO
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